Improvement in valye-gear foe oscillating engines



CHARLES HOVERTON AND D, B. OVERTON, AOF DOVER, NEW JERSEY.

Letters Patent No. 82,342, dated September 22, 1868.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, CHARLES H. OVERTON and D. B. OVERTON, of Dover, in the county of Morris, and State of N ew Jersey, have invented a new and improvedValve-Gear for Oscillating Engines and we do hereby declare the following to be a full, clear, and exact description thereof, which will enable others skilled in the art 'to make and use the same, reference being had tothe accompanying drawings, forming a part of this specication.

Figure lis a side view of an engine provided with my invention, the pillow-block for the steam side trunnion beingremoved to exhibit the parts more clearly.

Figure 2 is a top view of the engine and valve-gear.

The object of this. invention is to provide means whereby a slide-valve may be applied to an oscillating cylinder with effective result.

Y The principal objection to the valve-gear of oscillating engines, as heretofore made, was, that the oscillating valves used would not wear uniformly, and the apparatus requisite for poppet-valves was too complex, becoming f easily deranged, and being difficult to adjust.

By means of our invention, the common slide-valve, having a rectilineal reciprocating motion, may be employed, with perfect results.

'In the drawings- I A is the steam-chest, interposed between the trunnion and the cylinder. In practice, the trunnion is cast .in the steam-chest cov'er m. The side of the steam-chest is removed, to exhibit the valve B, which in this case is the common three-ported slide-valve.

The valve is actuated by means of an eccentric, C, or any other analogous device, as a cam-crank or the dike, and the rod D thereof is provided with a hoop, G, which encircles and works with finished contact upon' thereciprocating plate E.' This plate is provided with an extension, lH, connecting it with the valve-stem e, as shown, so that as the plate E is actuated to and fro by the eccentric-rod and hoop, the valve B will also. be moved to and fro with it. By this arrangement, the leadf canbe adjusted by the eccentric as in the case of fixed cylinder-engines.

y d is a guide-plate for the plate E, which latter is made with an opening having two parallel sides, n n, which t with easy contact on the corresponding plane sides, n 1t', of the guide-plate d, thus furnishing a means of guiding the plate E in a rectilineal motion when actuated by the hoop G, which works upon the said plate E. i

The plate d is mounted upon. a llet or collar, b, of the steam' side trnnnion a, and may. be keyed there, if desired, for it has no motion on the collar. The said collar bears no important function in the invention, being made simply as a bearing for the plate d, although the latter may with equal effect be mounted directly on the trunnioii itself. y

The steam is admitted through the trunuion e, and passes from the exhaust-port into an exhaust-cavity, leading to the opposite or exhaust-trunnion, in any suitable manner heretofore employed with oscillating engines. Y

Thusby our invention we obtain a rectilineal reciprocating motion, which enables us to use a slide-valve .or valves on an oscillating cylinder in a simple and e'ectivemannver.

We will note that we contemplate, in certain cases, placing a steam-chest and valve at each end of the cylinder, in which, case the central steam-chest A will be omitted, and the trunnion cast directly on the cylinder.

The hoop-plate E and plate d will encircle and work upon the trunnion, as before, and the plate E willbe provided with one or more extensions, suitable for connecting it with the valve-stem of the two valves.

We desire to be understood as not limiting ourselves to the'form of the plate d, that is to say, to the plane sides n n', for the said plate d may consist of an annulus or collar, working with finished contact ou the trunnien, and the points of its contact with the sides n n will furnish sufficient guide-surfaces for the plate E.

To permit the wearing of facets, the said annulus may be made to revolve slowly at each stroke of the valve.

Having thus described our invention, what we claim as new, and desire tofsecure by Letters Patent, is-

The arrangement ofY the hoop G, reciprocating plateE, and'guide-plate'd, with reference -to the trunnion a of an oscillating cylinder, substantially .asshown and described.

The above specification of our invention signed by us, this 6th day of June, 1868.

CHAS. H. OVERTON, D. B..OVERTON.

Witnesses FRANK BLocKLEY, ALEX. F.- ROBERTS. 

